Napkin holder



FIG. 1 is a top, front, right perspective view of a napkin holder showing our new design;

FIG. 2 is a front elevation view thereof, a rear elevation view being the same thereof;

FIG. 3 is a left side elevation view thereof, a right side elevation view being the same thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof.

The broken line showing represents unclaimed portions of the napkin holder and forms no part of the claimed design. 

CLAIM The ornamental design for a napkin holder, as shown and described. 